StayPresent vs Pulsetic vs Custom Flask Server for Python Bots

Comparing StayPresent, Pulsetic, and a hand-rolled Flask server for keeping a python bot alive — external monitoring vs in-process supervision.

StayPresent vs Pulsetic vs Custom Flask Server for Python Bots

A comment on an earlier comparison post asked how StayPresent stacks up against Pulsetic specifically, rather than UptimeRobot — a fair question, since Pulsetic has grown into a genuinely feature-rich external monitoring service in its own right. This post covers the same three-way comparison — an external monitor, a hand-rolled Flask server, and StayPresent — but with Pulsetic's specific feature set in view.

Table of Contents

1. What Pulsetic Actually Is
2. What Each Approach Solves
3. Monitoring Depth: Where Pulsetic Pulls Ahead
4. Crash Recovery: Where Pulsetic Can't Help
5. Status Pages vs a Bot Status Endpoint
6. Cost and Free-Tier Limits
7. Comparison Table
8. Using Pulsetic and StayPresent Together
9. FAQs
10. Conclusion

What Pulsetic Actually Is

Pulsetic is an external website and service uptime monitor, checking your endpoint from multiple global locations every 30 seconds and alerting through phone calls, SMS, email, Slack, and other channels when something goes down. Beyond bare uptime, it supports HTTP, ping, port, keyword, and heartbeat monitoring, along with SSL certificate expiration alerts and scheduled maintenance windows for planned deploys. It also offers customizable status pages with custom domains and password protection, aimed more at communicating uptime to end users than at keeping a background process alive.

What Each Approach Solves

Pulsetic is purely external — it never runs inside your bot's process. It watches your endpoint from the outside and tells you (and optionally your users, via a status page) when something's wrong.

A custom Flask server runs inside your process, alongside your bot, purely to give a hosting platform something to health-check. It doesn't monitor from the outside or alert anyone by itself.

StayPresent also runs inside your process, but goes further than a bare Flask server: it manages your bot as a supervised subprocess, restarts it on crash, and can optionally self-ping your own public URL to prevent host-side inactivity sleep.

These aren't fully overlapping tools — Pulsetic answers "is my bot reachable, and who do I tell if it isn't," while StayPresent answers "how do I keep my bot itself running, and satisfy my host's port requirement in the process."

Monitoring Depth: Where Pulsetic Pulls Ahead

If your priority is genuinely rich external monitoring — response-time trends over time, detailed uptime reports with response times from different locations worldwide, and alerting across several channels at once — Pulsetic goes considerably deeper than anything StayPresent attempts. StayPresent's ping()/cron() are intentionally simple: a GET request, a status code, an elapsed time, and an optional success/failure callback. They're built for keep-warm behavior, not for the kind of historical reporting and multi-location checking Pulsetic specializes in.

Crash Recovery: Where Pulsetic Can't Help

This is the same limitation any external monitor shares: Pulsetic can tell you your bot went down, but it has no mechanism to bring it back up — it doesn't run inside your process and has no access to your bot's subprocess. StayPresent restarts a crashed bot automatically:

staypresent.run(
    "bot.py",
    restart_on_crash=True,
    max_restarts=5,
    restart_delay=2.0,
)

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A team relying on Pulsetic alone still needs to be the one who notices the alert and manually restarts the service — or pairs it with something like StayPresent that actually manages the process.

Status Pages vs a Bot Status Endpoint

Pulsetic's status pages with logos, brand colors, and a custom domain are built for communicating with end users during an incident — genuinely useful if your bot has a customer-facing component people check on. StayPresent's web.json()/web.html() responses are a much lighter-weight equivalent: a status payload or dashboard served directly from your bot's own process, useful for your own debugging rather than public-facing incident communication. If you need the latter, Pulsetic's status pages are the more purpose-built tool; if you just need somewhere to glance at your bot's own internal state, StayPresent's built-in responses are enough on their own.

Cost and Free-Tier Limits

Pulsetic's free tier covers 50 monitors and 5-minute check intervals, with faster intervals and advanced features starting around $7.50 a month. StayPresent is MIT licensed and free regardless of scale — but it's solving a different problem, so the comparison isn't quite apples-to-apples: Pulsetic's pricing reflects the cost of running a global monitoring network from the outside, while StayPresent's functionality runs entirely inside a process you already control.

Comparison Table

Using Pulsetic and StayPresent Together

These tools aren't mutually exclusive, and combining them covers more ground than either alone: point Pulsetic at StayPresent's /health endpoint for genuine external, multi-location alerting and SSL monitoring, while StayPresent's own restart_on_crash and cron() handle the parts Pulsetic structurally can't — actually restarting a crashed bot process and generating keep-warm traffic from inside your own deployment.

staypresent.web.json({"status": "running"})
# Point Pulsetic's monitor at https://your-app.example.com/health

staypresent.run(
    "bot.py",
    restart_on_crash=True,
    max_restarts=5,
)

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FAQs

Does Pulsetic replace StayPresent's keep-alive HTTP server?
No — Pulsetic checks a URL from the outside; it doesn't provide anything for your hosting platform's own port-binding health check to reach. You still need something like StayPresent (or a custom server) running inside your deployment for that.

Can Pulsetic restart a crashed bot?
No — external monitors like Pulsetic can only detect and alert on downtime, not restart the underlying process, since they have no access to it.

Is Pulsetic worth using if I already have StayPresent's cron() self-ping?
They serve different purposes — cron() is about preventing host-side inactivity sleep; Pulsetic is about knowing (and telling others) when something is actually broken, from an outside vantage point.

Conclusion

Pulsetic and StayPresent aren't really competing for the same job. Pulsetic is a genuinely capable external monitoring and status-page service; StayPresent is an in-process bot supervisor and keep-alive HTTP server. For a python bot deployment, the strongest setup is usually both together — StayPresent keeping the bot itself alive and restarting it on crash, Pulsetic watching from the outside and telling you (or your users) when something still goes wrong.

pip install staypresent[prod]

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